From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-8.8 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,T_DKIMWL_WL_HIGH,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id A484CC43218 for ; Mon, 10 Jun 2019 22:16:38 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 78DCB2086A for ; Mon, 10 Jun 2019 22:16:38 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="uuWnN3sZ" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 78DCB2086A Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=lst.de Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-riscv-bounces+infradead-linux-riscv=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=FtG7gjMhx4onJM7hABJOzwF0OI4SWgS52v00Uh/f3xc=; b=uuWnN3sZODydJC qmOFNTOwooReoTKUnAnK0V0CdnVtEJKbPvZkFA5tWfjYoj1lfSH6JhpM5GrsdbDTpbTcZbngWbgbo cNEDpn1/IaLONlckKMs8NVniZLwED8yRcPGD2YxE9S2Nzel1J7nLhf49Cgd7keg8ScEgMxeG6En53 mwnr4G+hXhzDTIylKJZaY/2W0VgB81j/nXLWRPSnM9HYGp6red0lD/TOR4KpIpavdn3IRW79aYaGs 9HQySPNObUZZDUo8fyagyXzj7ftrvxhtzlo/mcviTKW69plB0HYM35rlo+a7cc81aBXbvqDBE62Zb ZT80+GYF19Y9KRvLTsnQ==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92 #3 (Red Hat Linux)) id 1haSaj-0002zG-FK; Mon, 10 Jun 2019 22:16:37 +0000 Received: from 089144193064.atnat0002.highway.a1.net ([89.144.193.64] helo=localhost) by bombadil.infradead.org with esmtpsa (Exim 4.92 #3 (Red Hat Linux)) id 1haSag-0002rx-26; Mon, 10 Jun 2019 22:16:34 +0000 From: Christoph Hellwig To: Palmer Dabbelt Subject: [PATCH 04/17] irqchip/sifive-plic: set max threshold for ignored handlers Date: Tue, 11 Jun 2019 00:16:08 +0200 Message-Id: <20190610221621.10938-5-hch@lst.de> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190610221621.10938-1-hch@lst.de> References: <20190610221621.10938-1-hch@lst.de> MIME-Version: 1.0 X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-mm@kvack.org, Damien Le Moal , linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org, uclinux-dev@uclinux.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-riscv" Errors-To: linux-riscv-bounces+infradead-linux-riscv=archiver.kernel.org@lists.infradead.org Archived-At: List-Archive: When running in M-mode we still the S-mode plic handlers in the DT. Ignore them by setting the maximum threshold. Signed-off-by: Christoph Hellwig --- drivers/irqchip/irq-sifive-plic.c | 12 ++++++++++-- 1 file changed, 10 insertions(+), 2 deletions(-) diff --git a/drivers/irqchip/irq-sifive-plic.c b/drivers/irqchip/irq-sifive-plic.c index cf755964f2f8..c72c036aea76 100644 --- a/drivers/irqchip/irq-sifive-plic.c +++ b/drivers/irqchip/irq-sifive-plic.c @@ -244,6 +244,7 @@ static int __init plic_init(struct device_node *node, struct plic_handler *handler; irq_hw_number_t hwirq; int cpu, hartid; + u32 threshold = 0; if (of_irq_parse_one(node, i, &parent)) { pr_err("failed to parse parent for context %d.\n", i); @@ -266,10 +267,16 @@ static int __init plic_init(struct device_node *node, continue; } + /* + * When running in M-mode we need to ignore the S-mode handler. + * Here we assume it always comes later, but that might be a + * little fragile. + */ handler = per_cpu_ptr(&plic_handlers, cpu); if (handler->present) { pr_warn("handler already present for context %d.\n", i); - continue; + threshold = 0xffffffff; + goto done; } handler->present = true; @@ -279,8 +286,9 @@ static int __init plic_init(struct device_node *node, handler->enable_base = plic_regs + ENABLE_BASE + i * ENABLE_PER_HART; +done: /* priority must be > threshold to trigger an interrupt */ - writel(0, handler->hart_base + CONTEXT_THRESHOLD); + writel(threshold, handler->hart_base + CONTEXT_THRESHOLD); for (hwirq = 1; hwirq <= nr_irqs; hwirq++) plic_toggle(handler, hwirq, 0); nr_handlers++; -- 2.20.1 _______________________________________________ linux-riscv mailing list linux-riscv@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-riscv